VLF, or Very Low Frequency testers, are used to conduct VLF Withstand Tests. These tests are typically carried out on a frequency between 0.1 Hz and 0.01 Hz, and operate off of a pass/fail model. Compared to traditional AC/DC Hipot testing, VLF test methods are able to more easily determine the high voltage field of certain loads of high capacitance. Its most frequently used to AC field test medium and high voltage cables, and test rotating machinery like motor and generator coils. VLF testing supports IEC 60502 and IEEE 400.2. Advanced Test Equipment Rentals offers VLF Hipot and Cable Testers from top brands like High Voltage, Baur, HV Diagnostics, and more.